Pascal's calculator, 17th Century artwork
Pascal's calculator. Historical artwork showing the mechanism inside a 17th Century mechanical device used to perform mathematical calculations. This device was invented in 1642 by the French mathematician Blaise Pascal (1623-1662). Known as the Pascaline, it used cogged wheels to perform additions and subtractions. Published in 1668.
© LIBRARY OF CONGRESS/SCIENCE PHOTO LIBRARY
Board Partition with Letter Rack and Music Book, 1668, by Co
Cornelius Norbertus Gijsbrechts (1657-1683). Flemish painter. Board Partition with Letter Rack and Music Book, 1668. National Museum of Denmark. Copenhagen. Denmark.
© Thaliastock / Mary Evans
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HUGH CAPET (941-996). First King of the Franks (987-996)
HUGH CAPET (941-996). First King of the Franks (987-996) of the Capetian dynasty. Portrait in Series 'Les Rois de France', c. 1650. MONCORNET, Balthasar (h. 1600-1668). Engraving. SPAIN. MADRID (AUTONOMOUS COMMUNITY). Madrid. National Library.
© J. Bedmar/Iberfoto/Mary Evans
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